You've come to the last applet in the series - the wind tunnel. Here, you'll be able to combine
everything you've learned in the first four applets, and experiment freely with the airfoil.
As you experiment, the streamlines will redraw themselves, and you can see the effects of your
changes. Notice the streamlines bunching closely together above the airfoil - that's where
the lift is strongest.
Once you're satisfied with what you've created, you can post your airfoil to the
Airfoil Gallery, where others can experiment with
what you've created. In addition, you can look at others' creations and modify them.
Warning: This applet is computationally intensive. On most modern computers, the time it takes
to update after you click is under one-tenth of a second, but on more outdated computers,
it may take as much as five seconds. Please don't click again, thinking nothing happened,
as the applet is recomputing the streamlines.
When the applet loads, you will see an airfoil with many lines around it - the
streamlines. The airfoil which appears by default is representative of
a modern airfoil. To look at an airfoil representative of that on the
Wright Brothers flier, click the "early" button. If you decide
you'd prefer to go back to a more modern airfoil, click the "modern" button.
Now that you've used all four previous applets, all the controls should be intuitive. However, if
you feel you don't know how to use some of the controls, here's a quick reference:
- Use the up and down arrows at the far right to change the angle of attack
- Use the arrows inside the curves to change the curvature
- Use the up and down arrows in the crossed lines to change the camber
- Use the left and right arrows in the crossed lines to change the chord length